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><A
NAME="DATATYPE-MONEY"
>8.2. Monetary Types</A
></H1
><P
>    The <TT
CLASS="TYPE"
>money</TT
> type stores a currency amount with a fixed
    fractional precision; see <A
HREF="datatype-money.html#DATATYPE-MONEY-TABLE"
>Table 8-3</A
>.  The fractional precision is
    determined by the database's <A
HREF="runtime-config-client.html#GUC-LC-MONETARY"
>lc_monetary</A
> setting.
    The range shown in the table assumes there are two fractional digits.
    Input is accepted in a variety of formats, including integer and
    floating-point literals, as well as typical
    currency formatting, such as <TT
CLASS="LITERAL"
>'$1,000.00'</TT
>.
    Output is generally in the latter form but depends on the locale.
   </P
><DIV
CLASS="TABLE"
><A
NAME="DATATYPE-MONEY-TABLE"
></A
><P
><B
>Table 8-3. Monetary Types</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><COL><THEAD
><TR
><TH
>Name</TH
><TH
>Storage Size</TH
><TH
>Description</TH
><TH
>Range</TH
></TR
></THEAD
><TBODY
><TR
><TD
>money</TD
><TD
>8 bytes</TD
><TD
>currency amount</TD
><TD
>-92233720368547758.08 to +92233720368547758.07</TD
></TR
></TBODY
></TABLE
></DIV
><P
>    Since the output of this data type is locale-sensitive, it might not
    work to load <TT
CLASS="TYPE"
>money</TT
> data into a database that has a different
    setting of <TT
CLASS="VARNAME"
>lc_monetary</TT
>.  To avoid problems, before
    restoring a dump into a new database make sure <TT
CLASS="VARNAME"
>lc_monetary</TT
> has
    the same or equivalent value as in the database that was dumped.
   </P
><P
>    Values of the <TT
CLASS="TYPE"
>numeric</TT
>, <TT
CLASS="TYPE"
>int</TT
>, and
    <TT
CLASS="TYPE"
>bigint</TT
> data types can be cast to <TT
CLASS="TYPE"
>money</TT
>.
    Conversion from the <TT
CLASS="TYPE"
>real</TT
> and <TT
CLASS="TYPE"
>double precision</TT
>
    data types can be done by casting to <TT
CLASS="TYPE"
>numeric</TT
> first, for
    example:
</P><PRE
CLASS="PROGRAMLISTING"
>SELECT '12.34'::float8::numeric::money;</PRE
><P>
    However, this is not recommended.  Floating point numbers should not be
    used to handle money due to the potential for rounding errors.
   </P
><P
>    A <TT
CLASS="TYPE"
>money</TT
> value can be cast to <TT
CLASS="TYPE"
>numeric</TT
> without
    loss of precision. Conversion to other types could potentially lose
    precision, and must also be done in two stages:
</P><PRE
CLASS="PROGRAMLISTING"
>SELECT '52093.89'::money::numeric::float8;</PRE
><P>
   </P
><P
>    When a <TT
CLASS="TYPE"
>money</TT
> value is divided by another <TT
CLASS="TYPE"
>money</TT
>
    value, the result is <TT
CLASS="TYPE"
>double precision</TT
> (i.e., a pure number,
    not money); the currency units cancel each other out in the division.
   </P
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